A New Approach for Road-Vehicle Vibration Simulation

摘要

A new approach for road-vehicle vibration simulation is proposed and demonstrated feasible by testing with three express-road vehicle-vibration records, that is, record A, two-wheel electric bicycle, 80% loaded, traveling on urban road; record B, median van, 50% loaded, traveling on urban road; and record C, minivan, 80% loaded, traveling on urban road too. This method decomposes the original signal into a series of approximate Gaussian-vibration segments and a shock segment with high kurtosis by moving crest factor and one-tenth peak-value method. Simulate Gaussian-distribution vibration one by one from the power spectral density (PSD) of each decomposed segments. The overall signal is simulated by concatenating of each decomposed Gaussian segment. The simulated signal has not only the same overall root-mean-square (RMS), duration as the original signal, but also has a similar PSD to the original signal, without incurring excessive acceleration levels. This allows an improved and more representative simulated input signal to be generated that can be use in the current generation of vibration table. Copyright (C) 2017 John Wiley & Sons, Ltd.